payne



Nw. 6, 192s. I 1,690,176

, C. PAYNE MACHINE FOR MIXING GYPSUM STUCCO Filed Aug. 22, 1927 3 Sheets-Sheet 2 Jiu/67W' MW ikyma@ C. PAYNE MACHINE FOR MIXING GYPSUM STUCCO Nov. 6, '1928.

Filed Aug. 22,' 1927 3 Sheets-Sheet 3 45 line '7 7 of Fig. 1.

, 'Patented Nov. 6, 1928. I l Y' y l UNI-IED s IAIESL' PAIE mine E Flicey;

CALEB PAYNIS,4 F CHICAGO, ILLINOIS; Assienon To oYPsUM y'ENC-r1'ui i'. i'JRING AND* Y 'MANUFAcrIJUii-Iive oo.,Y or CHICAGO, Immersa comoefiroisiA or; ILLINOIS;

l MACHINE son I VIvfIIzlIIve eYesUi/I sfrucco.

Application' sled August 22, 1927. sensi No. .e1-435719.`

This invention relatesto. mixing machines Yl`he 'supporting fr 'aniecan beset. in station-A and its objectis primarily yto provide a novel ary position ifpreierred.. j I Y machine of simple l'construction which cany be A cylinder 4 containing @mixing Chamber easily operated for mixing gypsum stucco is mounted uponthe 'i'ame'anda paddle in batches or asa continuous operation.` head 6 is arranged to travelup and down in '6o Anotherv important object of thev inventionthe mixing chamber.' This Apaddlehead"is is 'to piovideainixerforthoroughly mixing mounted on a tubular support Whichop-v caloined gypsum Aandwvater to obtain amiX erates through an opening inthe b ottonioif` ot uniform consistency. thelniixing chamber-. A transverse` shaftfS in It is a Well known iact that 0' r)sum stucc is supoorted in the main frame andl itcar- 65 is difficult tomix because of its tendency to ries apinion which meshes with a rack 1.0 buildup on lthe parts. with which it contacts formed by recessing tliegtubillar .support 7; and requiring Vthe mixing operation to be disand by operating' this shaft the paddle head continued'fronitirneVto time to permit the can be raised and` lowered in the mixing l5. partsto be4 cle anec l. -V chamber. The sliafty is connected byfja Y70 .Otheimobj'ectsj oi' the invention are vtol sprocket chain 11 Witha hand WheelxlQ provide a novel mixer Which will produce'a, mounted Y onabracket13 supported onjthe thorough incorporation of the Water with the lcylinder whereby the shaft may berotatel-V j calcined gypsum Without vallowinglan aecue` by hand. A clutch 14C on the shatt8 is adapt-r lofsn'iulation of set material to form on the pad- Ved toibo operated bya lever 15 for engaging 75 dies or on the side Walls of the mixingcham` the shaft with. a sleeve lloose on'the `shai't4 her, which will prevent the material from and carrying auxyorm. pinion 17 which meshes building up `onthe paddles and Walls of the with ayvorm 18 on a Vertical shaft l1,9,` F ig. mixing, chamberand clogging thel paddles, 2. Another' worm pinion 2O,` F ig. 5, on `the .5; ancl fwhich ivill avoid .the vdelays heretoforeshaft 19;v meshes Witha Worm 21 ona- Worin 'su occasioned by the necessity for cleaning the shai't21jvhich is .connected by a-coupling mixer from time to time. j" 22 with the shaft' 23 of a motor 24;. Thus V ith these and otherobjectsingvieiv,Ihave*: provision is made for. raising and lowering illustrated the invention inselectedeinbodi` the 4paddle head hand or power, as animent in the. aecompanyingY drawings.refer.- may be desired.`v`

ring to Which.: g `The upper paddle is 'mountedlion* lF a verticalsectional View. l i l yshaft 26 whichy extends down through.- the Flgzg Iis a detail enlarged sectional View paddle head and through the-frame or the on theline 2-2 of 1.. machine and carries the cone 27 which is vFig. 3 is a detailenlargedsectional lview' adapted fory operative' engagement With the m,

ontheline of. Fig. 1. Y Y, 1 socket 28 of acone clutch. This'. socket is F ig. L1 is a detail enlarged vieu/showing a rigidion asleeve 29 'which carriesa gear portionof the mixing chamber Aand parts .of' 1nesliing with `a pinion 31 on the shaft'32 the paddles. y I y Whichisinade rigid With'the shaft 191 andis Fig. 5 is a transversesectional,Viewon operated by the Worm and pinion21-20- i A 95 the line 5 5- or Fig. 1. y l gear 33 on the shaft 2 drives a pinionPAA 'F1-g,A 6 is a, transverse sgctonalyeyy on Y WlllCll 1S rigid kWith-'21.ASOClet 85 adapted t0 line 6 6 of F ig..l 1. receive a cone 86of another cone clutch5 Fig.

F ig. 7 is an enlarged seotional View on the 3. 'Ihe cone 27r and the cone 36 of the tWo` g f. clutches are rigidxon the shaft 26 .in suit-` m0 F ig. 8 is an enlarged vertical seetional'iview ably SPCGCl elaOIl t.0 Permit-Cf the dSled through the paddle head and a portion ofthe. travel. .of theY paddle head in the mixing' mixing chamber andmain frame. Clmmbl, The socketlnembers 283ml 35:03?. F ig. 9 Isla transverse Vsectional-view onjtho the two, clutches are mounted Inthe rameoj line` .Q -9.01 Fig. 8. of the machine and are drivenat different 105 Referring to, thedrawings 1 is vthe main jratesj ofspeed from the shafty 32 through the or supporting frame of the machinewvhi'oh pinion 31 and thlOdgll the gw33- .The lOWQl" y is conveniently. Amounted on Wheels 2 to travel paddle '37 is mounted on the hub 38 of airin-A on a track 3 sothat the mixer can beeasily ternal gear 39. A- gear 40'rigid .With the,v

moved about from placeto'placelas required. Y shaft 2 6 carrying the upperpaddle 37 meshesi 110 with idle pinions 41 which in turn mesh with the internal gear 39 whereby the paddles are caused to travel in opposite directions andA at different rates of speed, the upper paddle traveling at a higher rate of speed than the lower paddle. Then the clutch, 35, 36 is in engagement the paddle shaft 264 will be operated at a relatively high rate of speed by the gear 33 and the pinion 34, and when the clutch 27, 2 8 is in engagement the paddle shaft will be operated at a relatively low rate of speed by the pinion 31 and the gear 30, and in both cases' the upper paddle 25 will operate at a higher rate of speed than the lower paddle.

VThe planetary gearing for driving the lower paddle is housed within the paddle head which forms a bottom for the paddle chamber, and is provided peripherally with suit-- able packing rings 42 to prevent any part of the mix from passing below the head.

The upper paddle 25 has two oppositely directedrand upwardly inclined arms 25 provided at their outer ends with downwardly curved trailing fingers 25, Fig. S. The lower` paddle has two oppositel-y directed arms 3? provided at their outer ends with upwardly curved trailing fingers 3T. paddle head is slightly inclined from the center' vand the arms 37 are substantially parallel therewith and operate in scraping relation thereto. VThe lingers 25 of the upper paddle and the lingers 37 of the lower paddle scrape the inner surface of the mixing chamber 5 and they are arranged to clear` eachother in the oppositely directed movement of the paddles.

l prefer to run the upper paddle at a higher rate of speedethan the lower paddle, as herein described, but with some materials and for some purposes it will be entirely satisfactory to run both paddles at the same rate of speed, or to run the lower paddle at a higher rate of speed than the upper paddle. Variable speeds may be readily obtained by simple changes in the planetary gearing. It is, however, highly important that the paddles should travel in opposite directions and this is largely because of the peculiar properties of gypsum stucco whirh require violent agitation. As l have stated, the gypsum stucco tends to build up on all the parts with which it contacts within the mixer, but i have found that this is avoided by providing paddles which keep the inside wall ofl the mixing chamber clean and which travel at a relatively high rate of speed and create a cleansing splash which prevents the stucco from building up on the'paddles themselves., In batch mixing the operation of the paddle head as a plunger cleans the wall ofthe mixing chamber above the paddles and prevents the stucco from building up there. In both batch mixing Vand continuousA mixing the splash of the stucco created-by the rapidly revolving pad- The top of the l dles also prevents the stucco from building up on the wall of the mixing chamber.

ln the operation of the paddles, the stucco within the paddles is thrown outward by centrifugal force and the ingers of the paddles operate on the stucco adjacent to the wall ofthe cylinder. Thefmgers of the lower paddle throw the stucco upward and the fingers of the upper paddle throw t-he stucco downward4 so that the stuccowithin the range of operation of the paddles is kept in a high state of agitation.y If the paddle head is set for` batch mixing at the botto-m of the mixing -chamber and the chamber' is substantially full of stucco, vthe agitation ofthe stucco produced by the paddles will cause the stucco to move up and down in the chamber and pass through the Zone' of operation of the paddles so that the entire quantity of material inthe chamber is subjected to the violent agitation and mixing operation of the paddles. In other words. the opgositely operating paddles produce a thorough mixing agitation o-f the material within the Zone of operation of the paddles, and more than this they produce a movement of the material in the chamber which brings all of the material at some time or another into the zone of operation of the paddles sothat the entire quantity of material is thoroughly agitated and mixed. 'f

Vfhether the mixer is operatingas a. batch orv as a continuous mixer all of the material which enters the chamber will at some time pass through the Zone of operation ofthe paddles and become thoroughlyl agitated and mixed.

The paddle head is lowered to down position with the clutch 35, 3G thrown injto engagement so that the'paddle shaft 26 will be operatedl at high speed by the screw 33 and the pinion 34. Then the materials for the mix are introduced in the mixing chamber and the motor is started in operation. The paddles are operated at high speed in different directions and at different, rates of speed to thoroughly incorporate the water with the calcined gypsum. This requiresv about thirty seconds and then the operator throws. in the clutch 14 to operate the shaft 8 which causes the pinion 9 to operate the rack l0 for raising the tubular support 7 and' the paddle head to discharge the mix through they side opening 43. As the paddle head moves upward the clutch 35', 36 is disengaged and' the paddle stops revolving. As the paddle head' moves upward as a plunger it scrapes and cleans the side wall of the mixi'ng'chamber. As the paddles and paddle head' reach the upward limit of their movement in the mixing chamber t-he clutch 27, 28 is thrown into en'- gagement to operate the paddles at a relativelv low rateofspeedl for cleaning thewall of the mixing chamber at the upper end thereof` above thepaddl'e head. At this time the paddles revolve at a relatively lowl rate of speed`r to avoid scattering the mix. Then the clutch 14 is thrown out and the paddle head is permitted to lower to down position by gravity.

The hand wheel 12`may be operated to raise and to lower the plunger it desired. l

In batch mixing t-lie capacity of the mixing chamber will ordinarily conform with the out of the top of the chamber. The machiney herein shown and described is adapted for use as a batch mixer or as a continuous mixer.

Amixer the paddle head is elevated to a position closer to thel top ofthe mixing chamber and the cone 36 is correspondingly adjusted for operative engagement with theV socket 35 so that-the paddles' will operate continuously in this adjustment of the head.V Ordinarily the agitation of the stucco in continuous vmixing will be sufficient to keep the wall of the mixing chamber clean, that is to say free from stucco building up thereon, but at anytime the paddle head may be caused to move to its upward position with the clutch 27, 2S in engagement, to clean the wall of the mixing chamber at the top of thev chamber; this will ordinarily only be required as a preliminary to stopping the machine. To illustrate the change or the head i'or continuous mixing, in the general proportion of parts illustrated in Fig. l, I would say that the head should be raised from itspresent position about one-third of the distance to the overiiow 43.

My invention provides a machine of simple construction for mixing gypsum stucco in a superior manner to obtain a mix of uniform consistency with a thorough incorporation ofthe water and gypsum and without allowing any objectionable accumulation of set material to form on the paddles or the side walls of the mixing chamber which would delay operations. The construction is such that the operations may be conducted speedily as required with this class of mate- Y rial and in a manner to secure superior mixing results at all times.

Changes in the form, construction and arrangement of parts may be made to satisfy different conditions and for other reasons and I reserve the right to make all'such changes as fall within the scope of the olv 1 tion, means for moving said paddle head upward in the chamber as a plunger to dislowing claims.

I claim: l. In a machine tor mixing gypsum stucco, the combination of a mixing chamber, an upper paddle and a lower paddle in said chamber, means for revolving saidpaddles in opposite directions Aand at dierent'ratesoi speed, and means forV moving said paddles bodily in said chamber and at the same time automatically discontinuing the revolving movement of the paddles. Y 2. In a machine for mixing gypsumstucco,

' the combination of a mixing chamber, an upper paddle `and a lower paddle in said chamber, means for revolving said paddles in op posite 'directions and at diifierentnrates'oii.

speed, means or'nioving the paddles bodily in said chamber and at the same-time discontinuing the revolving movement of said padf movement ot the paddles at a different rate or speed than that ot the initial revolving movement;

3. In a machine for mixing gypsum stucco, the combination of anupright mixing chamber, an upper paddle and a lower paddlein said chamber, meansfor moving said .paddles vertically in4 saidchamber and at the same time discontinuing the revolving movenient or the paddles, and means for kresuming l the revolving mo-vemeiit of the paddles at the limitot1 the upward movement of the paddles and at a diilerent rate of speed than that of the initial revolving movement or' the paddles. c

4. In a. machine for mixing gypsum stucco, the combination of a mixing' chamber, a paddle head movable bodily as a plunger in said'mi'xing chamber, an upper paddle and a lower paddle mounted on said head, means-for operating said paddles to mix the stuccoy in the chamber, and means tor `moving theV plunger bodily in the chamber to'discharge the mix therefrom.

5. In a machine for mixing gypsum stucco, the combination of a mixing chamber, a paddle head movable bodily as a plunger in said mixing chamber, an upper paddle and a lower paddle mounted on said head, means for operating saidpaddles in initial position in opposite directions and at diilerent rates of speed to mix the st-ucco, means for moving the head and paddles bodily in the chamber to discharge the mix therefrom, means for discontinuing the revolving movement ot the Vpaddles while the head operates as a plunger, and means .for resuming the revolving` movement of the paddles as the head reaches the limit of its discharging movement to clean the discharge end of the chamber. Y

6. In a machine for mixing gypsum stucco, the combination of a mixing chamber, a paddle head in said chamber forming a bottom of the chamber during the mixing operacharge the mix from the chamber, an upper paddle and a lower paddle mounted on said head, a shaft passing through the head for ioo operating the upper paddle, means within the head driven by said shaft and operating the lower paddle at a lower rate ot speed than the upper paddle, and means for operating said shaft.

i". In a machine for mixing` gypsum stucco, the combination of a mixing chamber, paddle head arranged toact as a plunger in said chamber, Van upper paddle and a lower paddle mounted on said head7 a. sha-'ft passing through trie head for operatinzg` the upper paddle, means wit-hin the head driven by said shaft and operating` the lower paddle at a lower rate et speed t-.ian the upper paddle, means tor moving the head and paddles bodily in the chan'iher to discharge the mix, and means for rotatingl said shaft when the plunger is in initial position and when it is in linal discharge position and for automatically discontinuing the rotatingl movement of the shaft when the head is moving between said positions.

8. lzn a machine for mixing gypsum stucco', the combination ot' a mixing chamber, a paddle head arranged to act as a plunger in said chamber, an upper paddle and a. lower paddle mounted on said head, a. shalft passing` tnrough the head for operatin` the upper Leeoae paddle, means within the head driven by said shaft and operating the lower paddle at a lower rate ot vspeed than the upper paddle, means tor moving' the head and paddles bodily in the chamber to discharge the mix, means for operating` said shaft, and clutche to engage the shat't with its operating means when the head is in initial mixing position and when itis in linal discharge position, and for discngaging the shaft from its operating' means when the head is moving between said positions.

9. ln a machine forA mixii'ig gypsum stucco, the combination ot a n'nfingchamber, a paddle head, an upper paddle and a lower paddle mounted' on the head to revolve in opposite directions at the bottom ot' the chanr her, and means for operating the head bodily i a plunger to discharge the minY from said chamber.

l0. In a machine Jfor mixing gypsum stucco, the combination of a mixing chamber, a paddle head forming a bottom for said chamber, paddles mounted on sai d head, and means l'or moving the head paddle as a plunger in said chamber.

CALEB PAYNE. 

